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| Mirrors > Home > ILE Home > Th. List > pnfnre | Unicode version | ||
| Description: Plus infinity is not a real number. (Contributed by NM, 13-Oct-2005.) |
| Ref | Expression |
|---|---|
| pnfnre |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnex 8084 |
. . . . . 6
| |
| 2 | 1 | uniex 4502 |
. . . . 5
|
| 3 | pwuninel2 6391 |
. . . . 5
| |
| 4 | 2, 3 | ax-mp 5 |
. . . 4
|
| 5 | df-pnf 8144 |
. . . . 5
| |
| 6 | 5 | eleq1i 2273 |
. . . 4
|
| 7 | 4, 6 | mtbir 673 |
. . 3
|
| 8 | recn 8093 |
. . 3
| |
| 9 | 7, 8 | mto 664 |
. 2
|
| 10 | 9 | nelir 2476 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4178 ax-un 4498 ax-cnex 8051 ax-resscn 8052 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-nel 2474 df-rex 2492 df-rab 2495 df-v 2778 df-in 3180 df-ss 3187 df-pw 3628 df-uni 3865 df-pnf 8144 |
| This theorem is referenced by: renepnf 8155 nn0nepnf 9401 xrltnr 9936 pnfnlt 9944 xnn0lenn0nn0 10022 inftonninf 10624 pcgcd1 12766 pc2dvds 12768 |
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